Watch List notes:

*Sierra Leone Company, silver proof half-dollar / 50 cents, 1791, obv., sierra leone company, africa in exergue, crouching lion on hilltop, rev., half dollar piece, clasped shaded and unshaded hands, '50' above and below, edge plain, 12.87g (Vice FT 3A; KM5), choice mint state, lightly toned, very rare. 54 examples struck by Matthew Boulton between 1793 and 1799.
(2500-3500 GBP)